| Andrew Christopher Bolter | Director | 28 May 2003 | 1 Dec 2005 | British | 55 years |
| Benjamin John Guyatt | Director | 13 Jun 2008 | 1 Jun 2011 | British | 50 years |
| Carsten Matthias Wendt | Director | 1 Dec 2016 | 23 Nov 2021 | German | 49 years |
| Christian Leclercq | Director | 2 Jun 2008 | 31 Mar 2010 | Belgian | 60 years |
| Christopher John Thomas | Director | 1 Aug 1991 | 12 Apr 1997 | British | 70 years |
| David John Egan | Director | 1 Jun 2007 | 16 Jun 2008 | British | 58 years |
| David Jonathan Clarke | Director | 1 Jun 2011 | 1 Dec 2016 | British | 51 years |
| Graham Dransfield | Director | 29 May 1997 | 30 Jun 2008 | British | 74 years |
| Graham Dransfield | Secretary | 10 Dec 2007 | 30 Jun 2008 | British | - |
| Ian Stewart | Director | 14 Jul 1989 | 31 Jul 1991 | British | 86 years |
| Justin Richard Read | Director | 22 Oct 1999 | 28 May 2003 | British | 64 years |
| Kenneth John Ludlam | Director | 12 Apr 1997 | 28 May 2003 | British | 82 years |
| Leslie Ernest Thomas Ashford | Director | 1 Dec 1993 | 24 Dec 1993 | British | 85 years |
| Martin Gibbeson Taylor | Director | 25 Jun 1990 | 13 Mar 1992 | British | 90 years |
| Neil Freeman Wilkinson | Director | 14 Jul 1989 | 24 Dec 1993 | British | 89 years |
| Neil Freeman Wilkinson | Secretary | 14 Jul 1989 | 24 Dec 1993 | British | - |
| Nicholas Swift | Director | 28 May 2003 | 1 Jun 2007 | British | 61 years |
| Patrick Joseph O'shea | Director | 24 Dec 1993 | 29 May 1997 | British | 67 years |
| Patrick Joseph O'shea | Secretary | 24 Dec 1993 | 29 May 1997 | British | - |
| Paul Derek Tunnacliffe | Secretary | 29 May 1997 | 10 Dec 2007 | British | - |
| Peter Joseph Harper | Director | 14 Jul 1989 | 30 Sept 1994 | British | 90 years |
| Richard Robert Gimmler | Director | 13 Jun 2008 | 30 Dec 2009 | British | 58 years |
| Roger Thomas Virley Tyson | Secretary | 31 Jul 2008 | 10 Mar 2016 | British | - |
| Ruth Coulson | Director | 1 Dec 2005 | 20 Jun 2008 | Australian | 52 years |
| Samantha Jane Hurrell | Director | 29 May 1997 | 22 Oct 1999 | British | 62 years |
| Seyda Pirinccioglu | Director | 19 Jul 2010 | 31 Aug 2013 | Turkish | 54 years |